Property taxes are set to increase in Madison and St. Clair counties, and local taxpayers should know that through TIF districts, politicians divert tax dollars that could go toward schools, libraries and public services to separate accounts that foster a lack of transparency and accountability.

If an Illinois worker takes a pay cut during a recession, she knows the state isn’t going to take an even bigger chunk out of her paycheck. That’s because the state income tax rate stays the same. But if her home loses value, too, she could still see her property tax bill go up. Government...